The spider-web Begonia is truly remarkable.I would consider this one is more hardy compared to the Rex Begonia counter part.
It loves shade and occasional in direct sunlight upon it. I can grow quite huge given the best media, feeding and growing space. Too much sun can burn the leaves edges and the damage can big when you find a upright standing stalk with a left-over cup standing (or what is left of it)
The flowers are tiny and white and has a winged like bells when its about to bear fruit. I had yet to propagate them using seeds. As for now, this rhizome begonia is happy sitting in one corner in my garden.
The spider-web like foliage somehow never seemed to bore me. It is truly mysterious looking.
Unofficially, this one got another nickname known as "Papadum" due the shape and contour mimicking a South Indian dish. Hence it became famous for those who cultivated this particular begonia.
Begonia Common Names and Images
Here is the link where I had put together a list of all the begonias that I had come across. A database of all the different types & their characteristics. Please click on the link on the title above for the post.